Simplified Electromagnetic Analysis of Bulk Superconductor Magnetization

We have been developing a MRI system for small animals using a bulk superconducting magnet that can generate a very-high magnet field within a small space. Since highly uniform magnetic field ppm levels are required for MRI systems, it is important to have an electromagnetic simulation technique for...

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Published inTEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 50; no. 9; pp. 458 - 463
Main Authors NISHIHARA, Atsuo, MATSUDA, Kazuya, NISHIJIMA, Noriyo, MATSUSHIMA, Hitoshi
Format Journal Article
LanguageJapanese
English
Published Tokyo CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN 01.01.2015
Japan Science and Technology Agency
Subjects
Algorithms
Computer simulation
electromagnetic simulation, magnetization phenomena
high-temperature bulk superconductor
Magnetic fields
magnetic resonance imaging
Magnetization
Mathematical analysis
Maxwell's equations
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superconducting magnet
Superconductivity
Superconductors
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Summary:We have been developing a MRI system for small animals using a bulk superconducting magnet that can generate a very-high magnet field within a small space. Since highly uniform magnetic field ppm levels are required for MRI systems, it is important to have an electromagnetic simulation technique for the magnetization phenomena of the bulk superconductor. We have developed a new simulation algorithm for the magnetization of a bulk superconductor. The simulation algorithm solves Maxwell's equations based on FEM in an axi-symmetric cylindrical coordinate within a relatively short time. In this paper, details of the newly developed fast algorithm for simulating magnetization of a bulk superconductor are described, and an example calculation, which is validated with experimental results, is reported.
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ISSN:0389-2441
1880-0408
DOI:10.2221/jcsj.50.458